Finding the Fourth Proportional to 10,667.10, 15,979.05 and 7,383.90

Step by Step Solution

1. Step 1: Write the proportion equation
   10,667.10 : 15,979.05 = 7,383.90 : x
2. Step 2: Convert to fraction form
   10,667.10/15,979.05 = 7,383.90/x
3. Step 3: Cross multiply
   10,667.10x = 15,979.05 × 7,383.90
4. Step 4: Simplify right side
   10,667.10x = 117,987,707.30
5. Step 5: Solve for x
   x = 117,987,707.30/10,667.10
6. Step 6: Final answer
   x = 11,060.90